Need help diagnosing vibration
#11
11-17-2009, 12:06 PM
Diesel Fan
I agree with the other guy, these transfer case chains get loose and then they vibrate. Also, if this started when you did the rear brakes, put your truck up on stands and let someone put the truck in gear (while idling) and see if you have a wheel on crooked. The rear wheels go on and off really tight and the mounting surface has to be clean. It is dangerous so I wouldnt do it yourself, have someone sit in the drivers seat just incase.
#12
11-17-2009, 08:45 PM
Diesel Wrench
I agree with the other guy, these transfer case chains get loose and then they vibrate. Also, if this started when you did the rear brakes, put your truck up on stands and let someone put the truck in gear (while idling) and see if you have a wheel on crooked. The rear wheels go on and off really tight and the mounting surface has to be clean. It is dangerous so I wouldnt do it yourself, have someone sit in the drivers seat just incase.
#13
11-17-2009, 11:39 PM
Vibration started about 5 months ago. Last repair I had done before that was new rear brake calipers.
Vibration only occurs at speeds over 55mph, most pronounced between 65-70. The dash rattles, floorboard vibrates, etc. It's felt all over.
Things I have done with no resolve:
new tires
removed front drive shaft and drove
replaced both U joints on rear drive shaft.(the said it was balanced but I don't know that they had the equipment to do it?)
If you left off the gas and coast at 750rpm's, the vibration remains so I don't think it's related to the engine. The vibration feels the same speed as the drive train. If you hold on to the 4x4 shifter, you can feel the vibration there.
I just don't know what else would be vibrating? I suppose I could remove the rear shaft and drive it to see what happens.
Any advice?
thanks,
Vibration only occurs at speeds over 55mph, most pronounced between 65-70. The dash rattles, floorboard vibrates, etc. It's felt all over.
Things I have done with no resolve:
new tires
removed front drive shaft and drove
replaced both U joints on rear drive shaft.(the said it was balanced but I don't know that they had the equipment to do it?)
If you left off the gas and coast at 750rpm's, the vibration remains so I don't think it's related to the engine. The vibration feels the same speed as the drive train. If you hold on to the 4x4 shifter, you can feel the vibration there.
I just don't know what else would be vibrating? I suppose I could remove the rear shaft and drive it to see what happens.
Any advice?
thanks,
Subscribing. I have the same thing and replaced everything in the hunt with no luck. EXACT same symptoms. the only thing that has fixed is when I run stock tires. I'm curious to know what size rims and tires you have. I'm suspect its a wheel bearing issues due to tire mass or my 40" tires are out of round.
This is what I have replaced in the hunt without improvement:
4 new rims
rear drive line ujoints
rear drive line carrier
rear drive line balanced
front drive line ujoints
front drive line balanced
entire new trackbar
entire new tie rods
new front axle ujoints
new front rotors
front end alignment
front ball joints
3rd gen gear box stabalizer
#14
11-18-2009, 11:36 PM
Diesel Fan
#15
11-19-2009, 12:12 AM
Carrier bearing could be going out, but mine wasn't the problem.
I also did the same trick by removing drivelines one at a time... no luck.
The only thing that seemed to resolve the issue was putting stock tires on from the big 40's. Thats why I'm guessing wheel bearings or out of round tires.
You can get out of round tires brand new from the factory.
#16
11-20-2009, 08:04 AM
Diesel Wrench
No. the drivelines front and back were perfect and in balance.
Carrier bearing could be going out, but mine wasn't the problem.
I also did the same trick by removing drivelines one at a time... no luck.
The only thing that seemed to resolve the issue was putting stock tires on from the big 40's. Thats why I'm guessing wheel bearings or out of round tires.
You can get out of round tires brand new from the factory.
Carrier bearing could be going out, but mine wasn't the problem.
I also did the same trick by removing drivelines one at a time... no luck.
The only thing that seemed to resolve the issue was putting stock tires on from the big 40's. Thats why I'm guessing wheel bearings or out of round tires.
You can get out of round tires brand new from the factory.
or we could see if the driveshaft is positioned wrong like i said earlier, that does happen....
#17
11-20-2009, 09:01 PM
driveshaft could be positioned wrong, i've actually had this problem on my fathers dodge, take the driveshaft out but mark it on the transmission side. put the driveshaft back in 1 or 2 notches from either side of that mark. i played with that until the vibration went away. 
how would this have any affect on possible vehicle vibration. i'm not doubting, I just don't understand the reasoning and relation.
#19
11-21-2009, 12:49 PM
Diesel Wrench
ok im not exactly sure how it effects it but it does cause a vibration if the driveshaft isn't put back in the same position. so what im saying is take a white marker or something and draw a line on the driveshaft and draw a line on the output shaft or anywhere thats easy to see. as a reference mark. take the driveshaft out and put it back on one or two notches on either side of that mark, the vibration will either get better or worse. im pretty sure its a balance issue. 
#20
11-29-2009, 10:20 AM
Diesel Wrench
ok im not exactly sure how it effects it but it does cause a vibration if the driveshaft isn't put back in the same position. so what im saying is take a white marker or something and draw a line on the driveshaft and draw a line on the output shaft or anywhere thats easy to see. as a reference mark. take the driveshaft out and put it back on one or two notches on either side of that mark, the vibration will either get better or worse. im pretty sure its a balance issue.
